When growing and metabolizing through carbon resources of hydrocarbon, Pseudomonas 23-1 produces acidicacid and gas. The amount of acidic acid is 0. 015mol/L The output of gas,which thd main composition is CO2 and CH4, is 20ml/L. The organic acid and gas is the important reasons of decreasing the viscosity, enhancing the flow and improving the product of oil.%假单胞菌23-1烃代谢产生乙酸，产酸量0.015mol/L；产生CO2和CH4两种气体，产气量20mL/L。产酸产气23-1菌株成为微生物采油优良菌种。
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